Air-heater.



RT. SLAUIGHTER.A

AIR HEATER.

APPLICATION FILED MAY s. 1906.

'INVENTOH auf."

TTOHNEYS THE Noam: PETERS co., wasxlmamrl, suc.

ELIJAH T. SLAUGHTER, OF KANSAS CITY, MISSOURI.

AIR-HEATER.

Specification of Letters Patent.

Patented Jan. 15, 1907.

Application led May 3, 1906- Selial N0. 315.067.

To all whom, it may concern.-

Be it known that I, ELIJAE T. SLAUGHTER, a citizen of the United States, and a resident of Kansas City, in the county of Jackson and State of Missouri, have invented an Improved Air-Heater, of which the following is a specification.

My invention is an improvement in that class of air-heaters in which cold or relatively cool air is passed over or through a drum or other form of casing heated by a gas or other burner, the air escaping in a heated condition into the room in which the heater is'located or into a pipe leading therefrom to another room.

The chief objects obtained by my invention are greater simplicity and economy of construction of the heater and greater elhciency in the utilization of heat.

The details of construction, arrangement, and operation of the heater are illustrated in the accompanying drawings, in which- Figure l is a central vertical section of the same. Fig. 2 is a transverse section on the line 2 2 of Fig. l. Fig. 3 is a transverse section on the line 3 3 of Fig. l.

l indicates the inner drum or shell, constituting the air-heater proper, 2 a drum or shell inclosing the inner drum l, and 3 a casing surrounding and inclosing the top of the drums l and 2. All the parts l 2 3 are arranged concentrically and spaced apart,as shown. The casing 3 and middle drum 2 are attached to and supported on a fiat base 4. The inner drum or air-heater proper, l, is suspended from and supported by the middle drum 2 by means of a double-flange annulus or ring 5, the same being riveted to both, as will be readily understood from the drawings.

The air-heater 1 is made of less length than the drum 2, so that a large space is left below it to accommodate the gas or oil burner 6. The bottom l of the air-heater I is cup shape or concave-convex in form and riveted to the lower end of part l. This bottom Ia is provided with a downwardly and laterally extended pipe lb, the same being preferably cast integral with the bottom. It extends through the middle drum 2, and its mouth is adjacent to a large air-inlet 7, formed in the casing 3 near the bottom or base 4. The pipe 1b is made of large capacity in order that cold or relatively cool air may be freely admitted into the chamber of the drum 1. The top of the latter is open, but is traversed by a pipe 8, which conveys the products of combustion across it. Both ends of this pipe terminate in the annular space that inter venes the inner and middle drums l 2. The latter is provided on one side, near the top, with a collar or short pipe 9, that extends into the conduit l0, which serves to convey off the products of combustion.V

It will be seen in Fig. 1 that the pipe 8 ter minates short of the pipe 9, or, in other words, a narrow space intervenes them. It is apparent that by the medium of the burner 6 the air entering the chamber of the drum I is heated not only by contact with the cup-shape bottom 1a, but also with the sides of the drum 1, with which the products of combustion circulate in contact, and also by the pipe 8, through which the prod ucts of combustion pass from one side to the other of the air-heater 1.

It is, obvious that if the pipe 8 extended into the short pipe 9, attached to the middle drum 2 and fitted therein, all the products of combustion would pass up the left-hand side of the air-heater 1 and through the pipe 8, and in consequence the right-hand side of the part 1 would be heated to a less degree; but by arranging the pipe 8 so that a space is left between it and the escape-pipe 9 a current of the products of combustion is induced on the right-hand side of the drum l, and thus the circulation of the products of combustion and the heating of the drum l are equalized or rendered uniform.

The angle at which the air-inlet pipe lb is placed insures acceleration of the air-current as it passes into the chamber of drum l and also the eiiicient heating of the air by contact with the cup-shape bottom la. By casting the parts la and lb integral a considerable economy is effected in the construction of the drum or air-heater proper.

It will be further seen that since the airinlet pipe lb stops with the drum 2,or, in other words, does not extend across the space between drums 2 and 3, a current of air may pass upward in the space between pipe Ilb and opening 7, so that there is no dead-air space at that point` Further, the air being freely admitted at 7 may circulate around the lower portion of drum 2, and thus pass upward on the opposite side of the latter, as indicated by arrows. The top of the casing 3 is provided with openings through which the heated air may pass into the room or apartment in which the heater is located. One of IOO IIO

such openings may be provided",witha pipe 11, extended upward to any other room or apartment which requires to be heated, and another opening may be .closed by a damper l2. Thus the escape of heated air from the heater may be regulated as required. Access may be had to the space in which the burner is located through a hinged or other door 13.

What I claim isl. The improved heater comprising the outer shell or casing having an air-inlet at the bottom and air-outlets at the top, the inner drum or air-heater proper, the middle drum from which the air-heater is suspended, these parts being concentric and spaced apart, and the air-heater suspended from the middle drum and made of less length thanV the latter and provided with a cup-shape bottom having an air -inlet pipe extended downward and laterally through the middle drum and communicating with the air-inlet of the casing whereby air may enter the air-heater proper and also the annular space between the casing and the middle drum, and a pipe Jfor conveying the products of combustion arranged in the upper portion of the airheater proper and its discharge end located adjacent to but separated from the pipe conveying off the products of combustion whereby an induced current of the products of combustion is formed, substantially as described.

` 2. In an air-heater, a drum and a base to which it is attached, an inner drum or airheater proper, and means for suspending it from the inclosing drum, the bottom of said air-heaterslbeing cup shape and provided inlet, a pipe for conveying the products of with a downwardly and laterally extended air-combustion, the same arranged in and traversing the top portion of the air-heater, the outer drum having an alined pipe for conveying off the products of combustion, the two pipes being separated by a space as and for the purpose specied.

3. In an air-heater the combination with an inclosing drum 2 having a lateral pipe for conveyance of the products of combustion, of an inner drum or air-heater proper which is spaced from such outer drum, and means for closing the space at the top and suspending the inner drum, the latter having a bottoni provided with a downwardly-extended airinlet, a pipe for conveying the products of combustion which is arranged in and traverses the upper portion of the air-heating drum, its discharging end being separated from the pipe conveying off the products of combustion from the outer drum, as described.

ELIJAH T. SLAUGHTER. Witnesses:

SoLoN C. KEMoN, AMos W. HART. 

